Vacuum cleaner



FIG. 1 is a top, front, and right-side perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is an enlarged left perspective view of the portion of the vacuum cleaner shown within the area designated as 6 in FIG. 4.

The broken lines illustrate portions of the vacuum cleaner that form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 